The International School on Cosmological Dark Matter held in Valencia in the fall of 1993 was devoted to the interplay of cosmology and particle physics, with the obvious emphasis on the Dark Matter issue. Here I present the expanded version of my summary talk regarding the particle physics theory part of the School.

The past few years have seen several breakthroughs in particle astrophysics and cosmology. In several cases, new observations can only be explained with the introduction of new fundamental physics. In this talk I summarize some of these recent advances and describe several areas where progress may well be made in the future. More specifically, I focus on supersymmetric and axion dark matter, se...

In the light of recent experimental data on gaugino searches, we revisit the direct-transmission model of dynamical supersymmery breaking with the gravitino mass m ˜ G ≤ 16 eV, which does not have any cosmological or astrophysical problems. We find that in the consistent regions of parameter space, the model predicts not only upper bounds on superparticle masses (1. sleptons and right-handed sl...

In a large class of extra-dimensional models, a scalar degree of freedom known as the radion is long-lived, or even stable, on cosmological scales. In this paper we investigate the impact of radionactivity on the evolution of the universe. We demonstrate that whether the radion overcloses the universe, constitutes the dark matter, is the inflaton, the curvaton, or does not play any role in cosm...

The status of the microlensing search for galactic dark matter in the form of massive astronomical compact halo objects (machos) is reviewed. Unresolved issues are discussed, as well as possible ways to solve these.

We study the minimal SUGRA phenomenology in the case of an alternative seesaw mechanism for generating neutrino masses. Changes in the neutrino sector lead to a modification of the supersymmetric particle spectrum and the sneutrino naturally arises as the lightest supersymmetric particle. The obtained sneutrino has a relic density within the WMAP range and is compatible with present nuclear rec...

Recent observational and theoretical developments concerning the primordial synthesis of the light elements are reviewed, and the implications for dark matter mentioned.

J Schieck1,2∗, G Angloher3, A Bento4, C Bucci5, L Canonica5, X Defay6, A Erb6,7, F v Feilitzsch6, N Ferreiro Iachellini3, P Gorla5, A Gütlein1,2, D Hauff3, J Jochum8, M Kiefer3, H Kluck1,2, H Kraus9, J-C Lanfranchi6, J Loebell8, M Mancuso3, A Münster6, C Pagliarone5, F Petricca3, W Potzel6, F Pröbst3, R Puig1,2, F Reindl3, K Schäffner5, S Schönert6, W Seidel3, M Stahlberg1,2, L Stodolsky3, C St...

TBD Nima Arkani-Hamed (IAS): Thoughts on Particle Dark Matter